NZ Herald
  • Home
  • Latest news
  • Herald NOW
  • Video
  • New Zealand
  • Sport
  • World
  • Business
  • Entertainment
  • Podcasts
  • Quizzes
  • Opinion
  • Lifestyle
  • Travel
  • Viva
  • Weather

Subscriptions

  • Herald Premium
  • Viva Premium
  • The Listener
  • BusinessDesk

Sections

  • Latest news
  • New Zealand
    • All New Zealand
    • Crime
    • Politics
    • Education
    • Open Justice
    • Scam Update
  • Herald NOW
  • On The Up
  • World
    • All World
    • Australia
    • Asia
    • UK
    • United States
    • Middle East
    • Europe
    • Pacific
  • Business
    • All Business
    • MarketsSharesCurrencyCommoditiesStock TakesCrypto
    • Markets with Madison
    • Media Insider
    • Business analysis
    • Personal financeKiwiSaverInterest ratesTaxInvestment
    • EconomyInflationGDPOfficial cash rateEmployment
    • Small business
    • Business reportsMood of the BoardroomProject AucklandSustainable business and financeCapital markets reportAgribusiness reportInfrastructure reportDynamic business
    • Deloitte Top 200 Awards
    • CompaniesAged CareAgribusinessAirlinesBanking and financeConstructionEnergyFreight and logisticsHealthcareManufacturingMedia and MarketingRetailTelecommunicationsTourism
  • Opinion
    • All Opinion
    • Analysis
    • Editorials
    • Business analysis
    • Premium opinion
    • Letters to the editor
  • Politics
  • Sport
    • All Sport
    • OlympicsParalympics
    • RugbySuper RugbyNPCAll BlacksBlack FernsRugby sevensSchool rugby
    • CricketBlack CapsWhite Ferns
    • Racing
    • NetballSilver Ferns
    • LeagueWarriorsNRL
    • FootballWellington PhoenixAuckland FCAll WhitesFootball FernsEnglish Premier League
    • GolfNZ Open
    • MotorsportFormula 1
    • Boxing
    • UFC
    • BasketballNBABreakersTall BlacksTall Ferns
    • Tennis
    • Cycling
    • Athletics
    • SailingAmerica's CupSailGP
    • Rowing
  • Lifestyle
    • All Lifestyle
    • Viva - Food, fashion & beauty
    • Society Insider
    • Royals
    • Sex & relationships
    • Food & drinkRecipesRecipe collectionsRestaurant reviewsRestaurant bookings
    • Health & wellbeing
    • Fashion & beauty
    • Pets & animals
    • The Selection - Shop the trendsShop fashionShop beautyShop entertainmentShop giftsShop home & living
    • Milford's Investing Place
  • Entertainment
    • All Entertainment
    • TV
    • MoviesMovie reviews
    • MusicMusic reviews
    • BooksBook reviews
    • Culture
    • ReviewsBook reviewsMovie reviewsMusic reviewsRestaurant reviews
  • Travel
    • All Travel
    • News
    • New ZealandNorthlandAucklandWellingtonCanterburyOtago / QueenstownNelson-TasmanBest NZ beaches
    • International travelAustraliaPacific IslandsEuropeUKUSAAfricaAsia
    • Rail holidays
    • Cruise holidays
    • Ski holidays
    • Luxury travel
    • Adventure travel
  • Kāhu Māori news
  • Environment
    • All Environment
    • Our Green Future
  • Talanoa Pacific news
  • Property
    • All Property
    • Property Insider
    • Interest rates tracker
    • Residential property listings
    • Commercial property listings
  • Health
  • Technology
    • All Technology
    • AI
    • Social media
  • Rural
    • All Rural
    • Dairy farming
    • Sheep & beef farming
    • Horticulture
    • Animal health
    • Rural business
    • Rural life
    • Rural technology
    • Opinion
    • Audio & podcasts
  • Weather forecasts
    • All Weather forecasts
    • Kaitaia
    • Whangārei
    • Dargaville
    • Auckland
    • Thames
    • Tauranga
    • Hamilton
    • Whakatāne
    • Rotorua
    • Tokoroa
    • Te Kuiti
    • Taumaranui
    • Taupō
    • Gisborne
    • New Plymouth
    • Napier
    • Hastings
    • Dannevirke
    • Whanganui
    • Palmerston North
    • Levin
    • Paraparaumu
    • Masterton
    • Wellington
    • Motueka
    • Nelson
    • Blenheim
    • Westport
    • Reefton
    • Kaikōura
    • Greymouth
    • Hokitika
    • Christchurch
    • Ashburton
    • Timaru
    • Wānaka
    • Oamaru
    • Queenstown
    • Dunedin
    • Gore
    • Invercargill
  • Meet the journalists
  • Promotions & competitions
  • OneRoof property listings
  • Driven car news

Puzzles & Quizzes

  • Puzzles
    • All Puzzles
    • Sudoku
    • Code Cracker
    • Crosswords
    • Cryptic crossword
    • Wordsearch
  • Quizzes
    • All Quizzes
    • Morning quiz
    • Afternoon quiz
    • Sports quiz

Regions

  • Northland
    • All Northland
    • Far North
    • Kaitaia
    • Kerikeri
    • Kaikohe
    • Bay of Islands
    • Whangarei
    • Dargaville
    • Kaipara
    • Mangawhai
  • Auckland
  • Waikato
    • All Waikato
    • Hamilton
    • Coromandel & Hauraki
    • Matamata & Piako
    • Cambridge
    • Te Awamutu
    • Tokoroa & South Waikato
    • Taupō & Tūrangi
  • Bay of Plenty
    • All Bay of Plenty
    • Katikati
    • Tauranga
    • Mount Maunganui
    • Pāpāmoa
    • Te Puke
    • Whakatāne
  • Rotorua
  • Hawke's Bay
    • All Hawke's Bay
    • Napier
    • Hastings
    • Havelock North
    • Central Hawke's Bay
    • Wairoa
  • Taranaki
    • All Taranaki
    • Stratford
    • New Plymouth
    • Hāwera
  • Manawatū - Whanganui
    • All Manawatū - Whanganui
    • Whanganui
    • Palmerston North
    • Manawatū
    • Tararua
    • Horowhenua
  • Wellington
    • All Wellington
    • Kapiti
    • Wairarapa
    • Upper Hutt
    • Lower Hutt
  • Nelson & Tasman
    • All Nelson & Tasman
    • Motueka
    • Nelson
    • Tasman
  • Marlborough
  • West Coast
  • Canterbury
    • All Canterbury
    • Kaikōura
    • Christchurch
    • Ashburton
    • Timaru
  • Otago
    • All Otago
    • Oamaru
    • Dunedin
    • Balclutha
    • Alexandra
    • Queenstown
    • Wanaka
  • Southland
    • All Southland
    • Invercargill
    • Gore
    • Stewart Island
  • Gisborne

Media

  • Video
    • All Video
    • NZ news video
    • Herald NOW
    • Business news video
    • Politics news video
    • Sport video
    • World news video
    • Lifestyle video
    • Entertainment video
    • Travel video
    • Markets with Madison
    • Kea Kids news
  • Podcasts
    • All Podcasts
    • The Front Page
    • On the Tiles
    • Ask me Anything
    • The Little Things
  • Cartoons
  • Photo galleries
  • Today's Paper - E-editions
  • Photo sales
  • Classifieds

NZME Network

  • Advertise with NZME
  • OneRoof
  • Driven Car Guide
  • BusinessDesk
  • Newstalk ZB
  • Sunlive
  • ZM
  • The Hits
  • Coast
  • Radio Hauraki
  • The Alternative Commentary Collective
  • Gold
  • Flava
  • iHeart Radio
  • Hokonui
  • Radio Wanaka
  • iHeartCountry New Zealand
  • Restaurant Hub
  • NZME Events

SubscribeSign In
Advertisement
Advertise with NZME.
Home / New Zealand

Incredible 'breaking wave' clouds amaze as they form across the Palmerston North sky

NZ Herald
19 Feb, 2017 01:19 AM3 mins to read

Subscribe to listen

Access to Herald Premium articles require a Premium subscription. Subscribe now to listen.
Already a subscriber?  Sign in here

Listening to articles is free for open-access content—explore other articles or learn more about text-to-speech.
‌
Save

    Share this article

The "breaking wave" clouds, also know as Kelvin-Helmholtz instability waves, which formed over the eastern side of Palmerston North early today. Photo / Carl Gadsby

The "breaking wave" clouds, also know as Kelvin-Helmholtz instability waves, which formed over the eastern side of Palmerston North early today. Photo / Carl Gadsby

Waves were breaking in the Palmerston North sky this morning in a relatively uncommon phenomenon.

Unsurprisingly the formation is dubbed "breaking wave clouds" but its official title is Kelvin-Helmholtz instability, named after Scots-Irish scientist Lord Kelvin William Thomson and German physician and physicist Hermann von Helmholtz.

MetService meteorologist Tuporo Marsters said the formation was relatively uncommon and there needed to be certain conditions in the atmosphere - and its surrounds - for the breaking waves, or swans, to occur.

WOW! Fantastic shot of Kelvin-Helmholtz Waves shot by Carl Gadsby in Palmerston North! What are these? Find out: https://t.co/SY85BUbkoU ^CF pic.twitter.com/YrzewTntWX

— MetService (@MetService) February 18, 2017

Those conditions include moist air in a "stable situation" - no upward movement - and a steady wind source. The photo appeared to be taken early in the morning when temperatures were still cooler.

Advertisement
Advertise with NZME.
Advertisement
Advertise with NZME.

"It's pretty impressive, alright. It's probably one of the best Kelvin-Helmholtz waves I have ever seen," he said.

In this case, there was a steady easterly flowing, likely funnelling through the Manawatu Gorge, he said. The gorge is also needed to create the waves, as it acts like a barrier.

With the waves, the moist air is rolling over the cloud creating a wave-like formation.

He said the clouds appeared to be quite low and looking at the photo, has formed from right to left.

Advertisement
Advertise with NZME.

"The first one is the most perfect and then it breaks up on the third and fourth ... it's low cloud and they've got the prevailing wind which is going across it and it's enough to make these swan, or breaking wave, clouds."

He expected the clouds would have dissipated once temperatures or wind increased.

Palmerston North, like much of the North Island, had warm, muggy conditions overnight. It woke to 18C with a 10 knot, or 19km/h prevailing easterly, before climbing to 24C at lunchtime.

The city hadn't been too wet over the weekend, receiving just 30.8mm of rain between early Friday morning and 10am today.

Discover more

New Zealand

'Ball of fire' in skies over central NZ

24 Feb 05:36 PM

The rain levels were low compared to other parts of the country. Tauranga has been the wettest, receiving 144mm of rain, followed by Taupo on 107mm, Hamilton 104.6mm and Napier 105.4mm.

The parched areas of Whangarei, Kerikeri, Gisborne and Christchurch also received a bit of rain - 46mm, 62mm, 60.4mm and 8mm, respectively.

Marsters said the rain wasn't expected to go away in a hurry, with most places forecast for showers tomorrow. However, Taranaki would be the wettest with heavy showers and thunderstorms likely.

Save

    Share this article

Latest from New Zealand

Premium
Property

Ngāti Whātua Ōrākei wins Environment Court appeal for recognition

07 Jul 05:00 AM
Kahu

'Clear and compelling': Court confirms iwi dominance in key decision

07 Jul 05:00 AM
Politics

Acting PM David Seymour believes banks are paying their fair share of tax.

From early mornings to easy living

sponsored
Advertisement
Advertise with NZME.

Latest from New Zealand

Acting PM David Seymour believes banks are paying their fair share of tax.

Acting PM David Seymour believes banks are paying their fair share of tax.

The Act leader responded to questions about it emerged the Finance Minister was assessing banks' tax settings. Video / Mark Mitchell

‘Power grab’: Former PM, Māori leader, disgraced ex-MP lash Seymour’s bill

‘Power grab’: Former PM, Māori leader, disgraced ex-MP lash Seymour’s bill

07 Jul 04:38 AM
'Amazing achievements': Hawke's Bay Export Awards finalists announced

'Amazing achievements': Hawke's Bay Export Awards finalists announced

07 Jul 04:25 AM
‘He’s smooth. He’s a practised thief’: Former club CEO had a secret criminal past

‘He’s smooth. He’s a practised thief’: Former club CEO had a secret criminal past

07 Jul 04:10 AM
Solar bat monitors uncover secrets of Auckland’s night sky
sponsored

Solar bat monitors uncover secrets of Auckland’s night sky

NZ Herald
  • About NZ Herald
  • Meet the journalists
  • Newsletters
  • Classifieds
  • Help & support
  • Contact us
  • House rules
  • Privacy Policy
  • Terms of use
  • Competition terms & conditions
  • Our use of AI
Subscriber Services
  • NZ Herald e-editions
  • Daily puzzles & quizzes
  • Manage your digital subscription
  • Manage your print subscription
  • Subscribe to the NZ Herald newspaper
  • Subscribe to Herald Premium
  • Gift a subscription
  • Subscriber FAQs
  • Subscription terms & conditions
  • Promotions and subscriber benefits
NZME Network
  • The New Zealand Herald
  • The Northland Age
  • The Northern Advocate
  • Waikato Herald
  • Bay of Plenty Times
  • Rotorua Daily Post
  • Hawke's Bay Today
  • Whanganui Chronicle
  • Viva
  • NZ Listener
  • Newstalk ZB
  • BusinessDesk
  • OneRoof
  • Driven Car Guide
  • iHeart Radio
  • Restaurant Hub
NZME
  • About NZME
  • NZME careers
  • Advertise with NZME
  • Digital self-service advertising
  • Book your classified ad
  • Photo sales
  • NZME Events
  • © Copyright 2025 NZME Publishing Limited
TOP